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1、第39卷第1期艦船科學(xué)技術(shù)Vol.39,No.12017年1月SHIPSCIENCEANDTECHNOLOGYJan.,2017淺海信道調(diào)頻水聲語音通信方法比較李劍汶，王小陽，童峰(廈門大學(xué)水聲通信與海洋信息技術(shù)教育部重點(diǎn)實(shí)驗(yàn)室，福建廈門361100)摘要:水聲語音通信在海洋工程、海洋科考、水下搜救等領(lǐng)域具有廣泛應(yīng)用。與單邊帶通信、數(shù)字編碼調(diào)制通信相比，調(diào)頻水聲語音通信具有實(shí)現(xiàn)簡單方便、抗幅度衰落性能好的特點(diǎn)，但淺海水聲信道具有的復(fù)雜多徑效應(yīng)及噪聲嚴(yán)重影響其獲得的語音音質(zhì)，容易出現(xiàn)語音含混、語義難辨等問題。本文通過淺海不同距離、不同多徑信道下
2、的海試實(shí)驗(yàn)比較了采用非線性解調(diào)法和正交解調(diào)法的調(diào)頻語音通信性能，并通過客觀語音質(zhì)量評(píng)估PESQ（Per-ceptualevaluationofspeechquality）方法對(duì)調(diào)頻水聲語音通信音質(zhì)進(jìn)行量化評(píng)估。關(guān)鍵詞：水聲語音通信；調(diào)頻；非線性解調(diào)法；正交解調(diào)法；客觀語音質(zhì)量評(píng)估中圖分類號(hào)：TN9293文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1672–7619(2017)01–0127–05doi：10.3404/j.issn.1672–7619.2017.01.026ThecomparisonofunderwateracousticFMspeechcomm
3、unicationmethodsinshallowwaterchannelsLIJian-wen,WANGXiao-yang,TONGFeng(XiamenUniversity,KeyLaboratoryofUnderwaterAcousticCommunicationandMarineInformationTechnologyMinistryofEducation,Xiamen361100,China)Abstract:Underwateracousticspeechcommunicationplaysanimportantroleinma
4、rineengineering,marineresearch,underwatersearchandrescue,andrelatedfields.Comparedwiththeclassicsinglesidebandcommunicationanddigitalcodemodulationcommunication,frequencymodulation(FM)underwateracousticvoicecommunicationhasagoodperformanceinamplitudefadingresistanceandlowim
5、plementationcomplexity.However,shallowwaterchannelsfeaturedbycomplic-atedmultipathandnoisewillseriouslydegradethespeechcommunicationqualityofFMsystems,leadingtotheproblemofambiguousspeechandsemanticambiguity.ThispapercomparestheperformanceoftheunderwateracousticFMspeechcomm
6、unicationsystemusednonlineardemodulationmethodandorthogonaldemodulationmethodbythefieldexperimentindifferentshallowwaterchannels,andperformsquantitativeassessmenttothespeechcommunicationqualitythroughPESQ(Perceptualevaluationofspeechquality)method.Keywords:underwateracousti
7、cspeechcommunication；FM；nonlineardemodulationmethod；orthogonaldemodu-lationmethod；PESQ0引言數(shù)字語音通信系統(tǒng)可利用相干調(diào)制、語言編碼、信道匹配與均衡技術(shù)提高性能[3]。英國拉夫堡大學(xué)采水聲語音通信在國防建設(shè)、海洋資源開發(fā)、科用數(shù)字脈沖位置調(diào)制技術(shù)（DigitalPulsePositionModu-考、搜救等領(lǐng)域中有著很廣泛的應(yīng)用。采用模擬單邊lation，DPPM）實(shí)現(xiàn)語音通信[4]。殷敬偉等[5]設(shè)計(jì)了時(shí)帶調(diào)制技術(shù)的水聲通信設(shè)備如美國AN/WQC-2A水聲
8、域差分正交頻分復(fù)用技術(shù)（OrthogonalFrequencyDivi-通信機(jī)[1]受海洋水聲環(huán)境的影響很大，特別是水聲信sionMultiplexing，OFDM
